Fluid reversing valve



June 16, 1931. w. F. HOHULIN ,7

FLUID REVERSING vVALVE Filed March 4, 1930 2 Sheets-Sheet l June 16, 1931. w, HOHULIN 1,810,766

FLUID REVERSING VALVE Filed March 4. 1950 2 Sheets-Sheet 2 wherein adapted to be selectively"brought into comi th th h mediate portion'of which is at all times in Referring to the drawings in detail, it will of the drawings, whenthe passage 1e of 'the Patented June 16, 1931 J r 1,810,766

UNITED STATES PATENT OFFICE WILHELM FRIEDRICH HOHULI'N, OF OTTAWA, ILLIN-OIS FLUID nnvnasme VALVE Application fiIedMar-Oh' l, 1930.; Serial No. 433,104.

This invention relates to new and useful to a cylinder which also is not shown. The improvements influid reversing valves and ports 4 and 5 communicate with the chamber more particularly to devices of this character 2 on opposite sides of a vertical partition 6. which are especially adapted for use in: asso- The rear side of the casing 1 is open and ciation with cylinders having fluid actuated closure plate 7 is removably secured thereon pistons thereinbut it is to be understood that .tl1rough the medium of the screws 8. The a valve constructed in accordance with this closure 7 is provided with a centrally disinvention is-to be utilized" for any purpose for posed threaded opening 9" which constitutes which the same is found adapted. the fluid inlet openingto' the casing 1.

The primary object of this invention is to A core 10 is mounted for rotation in the provide, ina manner as hereinafter set forth, chamber 2 and said core is provided with a a fluid reversing valve of the aforementioned i Centrally disposed inner chamber 11 having character which is adapted to function in a communication with the inlet opening 9 manner to reverse the flow of the fluid to a I through an internally threaded annulus 12 15 cylinder or other machinery with a very slight mounted in said core for rotation therein, as movement of the actuating means on the clearly seen in Fig. 3 ofthe drawings; The l annulus 13 has its inner periphery'threade'd Other objects of the invention are to pro- .to receive a conduit (not shown which is vide a valve of the character set forth which threaded through the inlet opening 9 for will be simple in construction, strong, duraconveying the fluid into the chamber 11 of ble, efficient in its use, and which may be the valve. It will thus be seen that 'th'e'anmanufactured at low cost. nulus 12 is mounted on the inner endlof the All of the foregoing and still further ob-. fluid su-pplyoonduit and the core 10 rotatably jects and advantages of the invention may encircles said annulus. A- packing ring 13 is become apparent from a study of the followmounted in the outer periphery of the an ing specification, taken in connection with nulus 12 for engagement withthe core 16 the accompanying drawings, wherein like in a manner to seal thejoint therebetween. characters of reference designate correspond- The chamber 11 is provided with .a passage 14 ing parts throughout the several views, and extending from one side thereof which is 0 Figure 1 is a view in front elevation of a. munication with the ports at and 5 when the valve constructed in accordance with this core 10 is rotated in the casing. The core 10 i ti is further provided with a circumferentially Figure 2 is a vertical longitudinal sectional extending groove or channel 15 the inter- Figure 3 is a vertical transverse sectional communication with the outlet opening 3 and i th h th .1 the oppositeendsof which are adapted to be Figure l is a detail view in front elevation. selectively brought into registry with the of the valve core removed from the casing. ports 4 and 5. 'As willi'be' seen in Figure 2 be seen that the valve comprises a metallic ,innerchamb'er 11' of the core 10 isin'engagecasing 1 formed to provide a centrally dis- .ment with one of the ports 4 and 5, one ndof posed, substantially circular chamber 2 havthe channel 15 is 1n communication with'the ing an internally threaded integral out-let other of said ports.

boss 3 on its lower side in communication The casing 1' is ,providechon its forward with said chamber. On its upper side, the casside, with a circular opening-"'16 for rotatably ing 1 is provided with oppositely extending receiving the annular inner portion 17 of a horizontally disposed internally threaded polygonal shank 18 which terminates in a ports l and 5 to which suitable pipe connecreduced, circular threaded end portion 19 tions (not shown) are coupled and extend upon wh ch is threaded a retaining nut 20 on adapted to secure an actuating handle 21 on said polygonal shaft 18. A thrust washer 22 is disposed between the core 10 and the front wall of the casing 1. If desired, a thrust bearing in the form of anti-friction balls or rollers may be disposed between the core 10 and the front wall of the casing 1 in lieu of the washer 22.

In use, with the core in the position illustrated in Figure 2 of the drawings, fluid enters the chamber 11 through the passage 9 and the annulus 12 and flows from said chamber through the passage 14 and through the port to the cylinder in which the piston to be actuated is disposed through the pipe 23.

The fluid returns through the pipe 24 from the cylinder, enters the port 4 and passes into the channel 15 which is now in communication with said port a and from said channel 15 the fluid passes out through the outlet opening 3. Should the core be rotated in a manner to bring the passage 1 1 into com munication with the port 4 and the channel into communication with the port 5, the

' flow of the fluid to the cylinder and through the valve will be reversed, as will be apparent. By. shifting the core 10 so that the free end of the partition 6 extends over and closes the end of the passage 14, the valve will be in closed position and the fluid will be prevented from'flowing therethrough in either direction. I

It is believed that the many advantages of described comprising a casing having a circular chamber therein provided with a pair of ports on one side of the casing, a partition extending between the ports, said casing being further provided with an outlet port spaced from the pair of ports and a centrally disposed inlet port, and a rotary core mounted in the chamber having an inner chamber constantly in communication with the inlet port and a circumferentially extending peripheral channel constantly in communication, at an intermediate portion, with the outlet port and adapted to have its opposite end portions selectively brought into communication with the first named ports of the casing chamber, the inner core chamber being provided with an outlet passage adapted'to be selectively brought into communication with the first named ports whereby communication between the inlet port and one of the first named ports and between the outlet port and the other of said first named ports is simultaneously established upon rotation of the core in the casing, the outlet port of the inner chamber of the core being further adapted fordisposition in opposed relation to the free end of the partition in a manner to be closed thereby.

In testimony whereof I aflix my signature.

WILHELM FRIEDRICH HOHULIN.

a fluid reversing valve constructed in accordance with this invention will be readily understood, and although the preferred embodiment of the invention is as illustrated and described, it is to be understood that changes in the details of construction may be had I which will fall within the scope of the invention as claimed.

WVhat is claimed is r 1. A fluid reversing valve of the character described comprising a casing having a circular chamber therein provided with a pair of ports on one sideand an outlet port spaced from said pair of ports, said casing being further provided with a centrally disposed inlet port, and a core mounted for rotation in the chamber having an inner chamber constantly in communication with the inlet port of the casing and a ci'rcumferentially extending peripheral channel constantly in communication with the outlet port of the casing, said channel adapted to be selectively brought into communication with the first named ports, said inner core chamber having an outlet passage for selective communication with the first named ports whereby communication between the inlet port and one of the first named ports and between the outlet port and the other of said first named ports is simultaneously established upon rotation of the core in the casing.

2. A fluid reversing valve of the character 

